CHER-Ob (CULTURAL HERITAGE-Object) is an open source platform developed in an attempt to enhance analysis, evaluation, documentation, sharing and management of 3D and 2D visualizations as well as textual and conservation science data. CHER-Ob target audience range from cultural heritage professionals with limited IT experience (curators, archaeologist, conservators) to archaeological computing experts. At the theoretical session of the workshop, the software development conceptual background will be presented, its components and capabilities, and various examples of projects. Then, in a hands-on tutorial, the participants will be guided through the analysis of the Old Babylonian mathematical clay tablet known as the first representation of Pythagorean Theorem (Yale Babylonian Collection 7289) in CHER-Ob. Participants can either use the sample data or their own datasets for the hands-on tutorial.